Mr. Buffett picked Mr. Kass in March for his contrarian views on Berkshire and invited him to ask tough questions at the company's annual meeting, which concluded Saturday in Omaha. The 64-year-old hedge-fund manager from Palm Beach, Fla. holds a short position in Berkshire stock, meaning he is betting that shares of the giant conglomerate will fall. He also earned his "bear"...

RELATED VIDEO

Weekend With Buffett: Berkshire Hathaway Meetup

Berkshire Hathaway's annual meeting is about a lot more than a Q & A with Warren Buffett. WSJ's Jason Bellini tracks the picture-perfect moments and rapid rise of the annual pilgrimage to Omaha. Image: AP